From 523c648e5d388f2528661d0c71f0621e3810c13d Mon Sep 17 00:00:00 2001
From: Peter Hill <peter.hill@york.ac.uk>
Date: Mon, 23 Oct 2023 10:20:29 +0100
Subject: [PATCH] CMake: Don't add uninstall target and CPack config if not
 top-level

Fixes #2597
---
 CMakeLists.txt | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0191f1454c..ac0326d119 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,9 +6,7 @@
 # Set Project Properties
 ##################################
 
-#Minimum required CMake Version
-cmake_minimum_required(VERSION 3.12.0)
-# CMake 3.12: Use libraries specified in CMAKE_REQUIRED_LIBRARIES for check include macros
+cmake_minimum_required(VERSION 3.21.0)
 
 #Project Name
 project(netCDF
@@ -2789,5 +2787,6 @@ install(
 ####
 
 # CPack inclusion must come last.
-# INCLUDE(CPack)
-INCLUDE(CMakeInstallation.cmake)
+if (PROJECT_IS_TOP_LEVEL)
+  include(CMakeInstallation.cmake)
+endif()